mapping.ExportToPDF and mapping.ExportToJPEG

I've created an mxd and successfully added ArcBruTile layers within ArcGIS. When I use a python script to access the mxd and export a PDF or JPG, the ArcBruTile layers do not show up.

Any ideas?

Edit: Others have faced this issue and abandoned ArcBruTile. I'd like to use the Stamen layers, so their way of adding OSM through ArcGIS's native way won't work for me. I was able to confirm that using their way worked though for OSM.